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| author | Suzuki K Poulose <suzuki.poulose@arm.com> | 2017-04-03 16:12:43 +0200 |
|---|---|---|
| committer | Christoffer Dall <cdall@linaro.org> | 2017-04-04 14:33:50 +0200 |
| commit | 8b3405e345b5a098101b0c31b264c812bba045d9 (patch) | |
| tree | a2f0221b459b0aa5ed41230a50fdcc02d59647b2 /arch/arm/mach-gemini | |
| parent | arm/arm64: KVM: Take mmap_sem in kvm_arch_prepare_memory_region (diff) | |
| download | linux-8b3405e345b5a098101b0c31b264c812bba045d9.tar.xz linux-8b3405e345b5a098101b0c31b264c812bba045d9.zip | |
kvm: arm/arm64: Fix locking for kvm_free_stage2_pgd
In kvm_free_stage2_pgd() we don't hold the kvm->mmu_lock while calling
unmap_stage2_range() on the entire memory range for the guest. This could
cause problems with other callers (e.g, munmap on a memslot) trying to
unmap a range. And since we have to unmap the entire Guest memory range
holding a spinlock, make sure we yield the lock if necessary, after we
unmap each PUD range.
Fixes: commit d5d8184d35c9 ("KVM: ARM: Memory virtualization setup")
Cc: stable@vger.kernel.org # v3.10+
Cc: Paolo Bonzini <pbonzin@redhat.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Christoffer Dall <christoffer.dall@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
[ Avoid vCPU starvation and lockup detector warnings ]
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Christoffer Dall <cdall@linaro.org>
Diffstat (limited to 'arch/arm/mach-gemini')
0 files changed, 0 insertions, 0 deletions